JavaFX | Rectangle2D 类
Rectangle2D 类是 JavaFX 的一部分。Rectangle2D 类使用矩形左上角的给定坐标以及宽度和高度创建一个矩形，或者由位置(minX，minY)和尺寸(宽度 x 高度)定义。
类的构造函数:
- Rectangle2D(双 minX，双 minY，双宽度，双高度):用指定的宽度高度和矩形左上角的坐标创建一个新的 Rectangle2D
常用方法:
| 方法 | 说明 |
|---|---|
| 包含(双 x，双 y) | 检查指定的坐标是否在矩形 2D 的边界内。 |
| 包含(双 x，双 y，双 w，双 h) | 检查指定的矩形是否位于给定的矩形内 |
| 包含(点 2D p) | 检查指定的点 2D 坐标是否在矩形 2D 的边界内。 |
| 包含(矩形 2D r) | 检查指定的矩形是否位于给定的矩形内 |
| getHeight（） | 返回矩形的高度 |
| getWidth（） | 返回矩形的宽度 |
| getMaxX（） | 此矩形 2 右下角的 x 坐标。 |
| getMinX() | 此矩形 2 左上角的 x 坐标。 |
| getMaxY() | 此矩形 2 右下角的 y 坐标。 |
| getMinY() | 此矩形 2 左上角的 y 坐标。 |
| 相交(双 x，双 y，双 w，双 h) | 检查指定的矩形是否与矩形二维对象相交 |
| 相交(矩形 2D r) | 检查指定的矩形 2D 是否与矩形 2D 对象相交 |
下面的程序说明了 Rectangle2D 类的使用:
-
Java Program to create an object of Rectangle2D and display its details and whether it contains a point and check whether it intersects a rectangle or not: This program creates a Rectangle2D object named rectangle with minX, minY, height and width as parameters. The details of the Rectangle2D object is displayed using the display function. The display function displays the upper left coordinate of the rectangle and the bottom right corner of the rectangle and its width and height using the getMinX(), getMinY(), getMaxX(), getMaxY(), getHeight(), and getWidth() function. We will see whether the rectangle contains a point using the contains() function and also check whether it intersects the other rectangle using the intersects function and display the results.
```java // Java Program to create an object of // Rectangle2D and display its details // and whether it contains a point and // whether it intersects a rectangle or not import javafx.geometry.; import java.util.;
class Rectangle_1 {
// Main Method public static void main(String args[]) { try {
// rectangle object Rectangle2D rectangle = new Rectangle2D(100, 100, 100, 100);
// display the rectangle display(rectangle);
// Check whether the rectangle contains a point System.out.println("The rectangle contains point 150, 150 = " + rectangle.contains(new Point2D(150, 150)));
System.out.println("The rectangle contains point 50, 50 = " + rectangle.contains(new Point2D(50, 50)));
// Check Whether the rectangle // intersects another rectangle System.out.print("The rectangle intersects another rectangle " +"with width = 100, height = 100, minX = 50, & minY = 50: " + rectangle.intersects(50, 50, 100, 100)); }
catch (Exception e) { System.err.println(e.getMessage()); } }
// display function public static void display(Rectangle2D rectangle) {
// display the details of a rectangle System.out.println("Upper left point of the rectangle is = " + rectangle.getMinX() + ", " + rectangle.getMinY());
System.out.println("Lower right point of the rectangle is = " + rectangle.getMaxX() + ", " + rectangle.getMaxY());
System.out.println("Width and Height of the rectangle is = " + rectangle.getWidth() + ", " + rectangle.getHeight()); } } ```
输出:
矩形的左上角点为= 100.0，100.0 矩形的右下角点为= 200.0，200.0 矩形的宽度和高度为= 100.0，100.0 矩形包含点 150，150 =真 矩形包含点 50，50 =假 矩形与另一个矩形相交，宽度= 100，高度= 100，minX = 50，&minY = 0
-
Java Program to create two objects of Rectangle2D and display its details and check whether it intersects each other or not: This program creates two Rectangle2D objects named rectangle_1, and rectangle_2 with minX, minY, height, and width as parameters. The details of the Rectangle2D object is displayed using the display function. The display function displays the upper left coordinate of the rectangle and the bottom right corner of the rectangle and its width and height using the getMinX(), getMinY(), getMaxX(), getMaxY(), getHeight(), and getWidth() function. We will check whether it intersects the other rectangle or not using the intersects function and display the results.
```java // Java Program to create two objects of // Rectangle2D and display its details and // check whether it intersects each other or not import javafx.geometry.; import java.util.;
class Rectangle_1 {
// Main Method public static void main(String args[]) { try {
// rectangle object Rectangle2D rectangle_1 = new Rectangle2D(100, 100, 100, 100);
Rectangle2D rectangle_2 = new Rectangle2D(100, 100, 100, 100);
// display the rectangle details System.out.println("Rectangle_1 details"); display(rectangle_1);
System.out.println("");
System.out.println("Rectangle_2 details"); display(rectangle_2);
// display whether these two // rectangle intersects or not System.out.println("These two rectangles intersect = " + rectangle_1.intersects(rectangle_2)); }
catch (Exception e) { System.err.println(e.getMessage()); } }
// display method public static void display(Rectangle2D r) {
// display the details of a rectangle System.out.println("Upper left point of the rectangle is = " + r.getMinX() + ", " + r.getMinY());
System.out.println("Lower right point of the rectangle is = " + r.getMaxX() + ", " + r.getMaxY());
System.out.println("Width and Height of the rectangle is = " + r.getWidth() + ", " + r.getHeight()); } } ```
输出:
矩形 _1 详情 矩形的左上点为= 100.0，100.0 矩形的右下点为= 200.0，200.0 矩形的宽度和高度为= 100.0，100.0
矩形 _2 详情 矩形左上角点为= 100.0，100.0 矩形右下角点为= 200.0，200.0 矩形的宽度和高度为= 100.0，100.0 这两个矩形相交=真
注意:上述程序可能无法在在线 IDE 中运行。请使用离线编译器。
参考:https://docs . Oracle . com/javase/8/JavaFX/API/JavaFX/geometry/rectangle2d . html
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